Home / 643,451.02-888,041.15-371,518.45

Finding the Fourth Proportional to 643,451.02, 888,041.15 and 371,518.45

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Solution

The fourth proportional to 643,451.02, 888,041.15 and 371,518.45 is: 512,740.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,451.02 : 888,041.15 = 371,518.45 : x
  2. Step 2: Convert to fraction form
    643,451.02/888,041.15 = 371,518.45/x
  3. Step 3: Cross multiply
    643,451.02x = 888,041.15 × 371,518.45
  4. Step 4: Simplify right side
    643,451.02x = 329,923,672,875.52
  5. Step 5: Solve for x
    x = 329,923,672,875.52/643,451.02
  6. Step 6: Final answer
    x = 512,740.93

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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.