Home / 765,657.55-1,056,614.58-421,500.30

Finding the Fourth Proportional to 765,657.55, 1,056,614.58 and 421,500.30

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Solution

The fourth proportional to 765,657.55, 1,056,614.58 and 421,500.30 is: 581,674.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,657.55 : 1,056,614.58 = 421,500.30 : x
  2. Step 2: Convert to fraction form
    765,657.55/1,056,614.58 = 421,500.30/x
  3. Step 3: Cross multiply
    765,657.55x = 1,056,614.58 × 421,500.30
  4. Step 4: Simplify right side
    765,657.55x = 445,363,358,307.36
  5. Step 5: Solve for x
    x = 445,363,358,307.36/765,657.55
  6. Step 6: Final answer
    x = 581,674.35

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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.