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Finding the Fourth Proportional to 528,545.72, 729,393.56 and 286,828.29

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Solution

The fourth proportional to 528,545.72, 729,393.56 and 286,828.29 is: 395,823.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,545.72 : 729,393.56 = 286,828.29 : x
  2. Step 2: Convert to fraction form
    528,545.72/729,393.56 = 286,828.29/x
  3. Step 3: Cross multiply
    528,545.72x = 729,393.56 × 286,828.29
  4. Step 4: Simplify right side
    528,545.72x = 209,210,706,117.67
  5. Step 5: Solve for x
    x = 209,210,706,117.67/528,545.72
  6. Step 6: Final answer
    x = 395,823.29

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Double scale
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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.