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Finding the Fourth Proportional to 864,807.84, 1,297,211.76 and 391,482.72

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Solution

The fourth proportional to 864,807.84, 1,297,211.76 and 391,482.72 is: 587,224.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,807.84 : 1,297,211.76 = 391,482.72 : x
  2. Step 2: Convert to fraction form
    864,807.84/1,297,211.76 = 391,482.72/x
  3. Step 3: Cross multiply
    864,807.84x = 1,297,211.76 × 391,482.72
  4. Step 4: Simplify right side
    864,807.84x = 507,835,988,220.79
  5. Step 5: Solve for x
    x = 507,835,988,220.79/864,807.84
  6. Step 6: Final answer
    x = 587,224.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.