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Finding the Fourth Proportional to 643,242.66, 887,094 and 401,547.60

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Solution

The fourth proportional to 643,242.66, 887,094 and 401,547.60 is: 553,773.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,242.66 : 887,094 = 401,547.60 : x
  2. Step 2: Convert to fraction form
    643,242.66/887,094 = 401,547.60/x
  3. Step 3: Cross multiply
    643,242.66x = 887,094 × 401,547.60
  4. Step 4: Simplify right side
    643,242.66x = 356,210,466,674.40
  5. Step 5: Solve for x
    x = 356,210,466,674.40/643,242.66
  6. Step 6: Final answer
    x = 553,773.08

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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.