Home / 722,985.10-997,719.51-400,715.98

Finding the Fourth Proportional to 722,985.10, 997,719.51 and 400,715.98

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Solution

The fourth proportional to 722,985.10, 997,719.51 and 400,715.98 is: 552,988.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,985.10 : 997,719.51 = 400,715.98 : x
  2. Step 2: Convert to fraction form
    722,985.10/997,719.51 = 400,715.98/x
  3. Step 3: Cross multiply
    722,985.10x = 997,719.51 × 400,715.98
  4. Step 4: Simplify right side
    722,985.10x = 399,802,151,214.77
  5. Step 5: Solve for x
    x = 399,802,151,214.77/722,985.10
  6. Step 6: Final answer
    x = 552,988.09

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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.