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Finding the Fourth Proportional to 528,587.70, 729,451.53 and 286,870.32

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Solution

The fourth proportional to 528,587.70, 729,451.53 and 286,870.32 is: 395,881.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,587.70 : 729,451.53 = 286,870.32 : x
  2. Step 2: Convert to fraction form
    528,587.70/729,451.53 = 286,870.32/x
  3. Step 3: Cross multiply
    528,587.70x = 729,451.53 × 286,870.32
  4. Step 4: Simplify right side
    528,587.70x = 209,257,993,835.59
  5. Step 5: Solve for x
    x = 209,257,993,835.59/528,587.70
  6. Step 6: Final answer
    x = 395,881.32

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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.