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Finding the Fourth Proportional to 876,216.40, 1,209,178.74 and 473,808.40

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Solution

The fourth proportional to 876,216.40, 1,209,178.74 and 473,808.40 is: 653,855.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,216.40 : 1,209,178.74 = 473,808.40 : x
  2. Step 2: Convert to fraction form
    876,216.40/1,209,178.74 = 473,808.40/x
  3. Step 3: Cross multiply
    876,216.40x = 1,209,178.74 × 473,808.40
  4. Step 4: Simplify right side
    876,216.40x = 572,919,044,113.42
  5. Step 5: Solve for x
    x = 572,919,044,113.42/876,216.40
  6. Step 6: Final answer
    x = 653,855.65

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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.