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Finding the Fourth Proportional to 528,363.24, 729,140.76 and 286,645.80

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Solution

The fourth proportional to 528,363.24, 729,140.76 and 286,645.80 is: 395,570.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,363.24 : 729,140.76 = 286,645.80 : x
  2. Step 2: Convert to fraction form
    528,363.24/729,140.76 = 286,645.80/x
  3. Step 3: Cross multiply
    528,363.24x = 729,140.76 × 286,645.80
  4. Step 4: Simplify right side
    528,363.24x = 209,005,136,462.81
  5. Step 5: Solve for x
    x = 209,005,136,462.81/528,363.24
  6. Step 6: Final answer
    x = 395,570.93

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.