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Finding the Fourth Proportional to 528,858.81, 730,426.05 and 356,479.47

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Solution

The fourth proportional to 528,858.81, 730,426.05 and 356,479.47 is: 492,346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,858.81 : 730,426.05 = 356,479.47 : x
  2. Step 2: Convert to fraction form
    528,858.81/730,426.05 = 356,479.47/x
  3. Step 3: Cross multiply
    528,858.81x = 730,426.05 × 356,479.47
  4. Step 4: Simplify right side
    528,858.81x = 260,381,891,178.19
  5. Step 5: Solve for x
    x = 260,381,891,178.19/528,858.81
  6. Step 6: Final answer
    x = 492,346.70

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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.