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Finding the Fourth Proportional to 569,276.32, 785,603.68 and 311,158.40

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Solution

The fourth proportional to 569,276.32, 785,603.68 and 311,158.40 is: 429,399.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    569,276.32 : 785,603.68 = 311,158.40 : x
  2. Step 2: Convert to fraction form
    569,276.32/785,603.68 = 311,158.40/x
  3. Step 3: Cross multiply
    569,276.32x = 785,603.68 × 311,158.40
  4. Step 4: Simplify right side
    569,276.32x = 244,447,184,102.91
  5. Step 5: Solve for x
    x = 244,447,184,102.91/569,276.32
  6. Step 6: Final answer
    x = 429,399.88

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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.